Spice up your videos, games, applications or just make system alerts a little more hilarious by downloading sound effects from Soundsnap. Whether you're an electronic musician using Ableton Live or a budding YouTube auteur looking to flesh out the audio on a Final Cut Pro project, libraries of free sound effects, loops and samples are like manna (I'm a longtime fan of The Freesound Project). All the sound effects at Soundsnap are uploaded by creators, so if you've already done some foley work or futzed around with a Moog to produce sci-fi ambience, help out others by contributing. There are already many thousands of audio clips already available. If you're a multimedia maker, what sound effects sources do you use?